Alumina-lantana (2.5, 5, 7.5 and 10 wt% La) mixed oxides of suitable texture to be applied as supports of catalysts for hydrodesulfurization of FCC naphtha-range oil-derived distillates were prepared by rare-earth pore-filling impregnation through corresponding nitrate. Co, Mo and P were deposited on binary carriers by one-pot simultaneous impregnation method used during commercial hydrotreating catalysts preparation. Materials were characterized by N₂ physisorption, XRD, SEM–EDS, adsorbed CO₂ FTIR (basicity measurements), Raman and UV–vis spectroscopies. Sulfided catalysts were studied by chemical composition (EDAX) and HR-TEM. In general, amount and strength of surface basic sites increased with rare-earth content in binary carriers at 5 wt% and higher. Deposited molybdates dispersion augmented with lanthanum content in carriers. However, progressively increasing rare-earth loading on supports was detrimental on gas-phase thiophene HDS (523–563 K, steady-state fixed-bed plug-flow reactor operating at atmospheric pressure). Hardly sulfidable tetrahedral Mo species could be originated by decomposition of heteropolymolybdates originally present in one-pot acidic (pH ~ 1.9) Co–Mo–P solutions by impregnating at basic conditions in pores of La-modified carriers. At isoconversion (~ 10%) rare-earth containing sulfided CoMo catalysts had decreased yield to fully saturated n-butane as to the material supported on pristine alumina.

通过稀土孔填充浸渍法通过相应的方法制备了质地合适的氧化铝-马tana丹（2.5、5、7.5和10 wt％La）混合氧化物，用作FCC石脑油范围油衍生馏分的加氢脱硫催化剂的载体。硝酸盐 通过在工业加氢处理催化剂制备过程中使用的一锅同时浸渍法将Co，Mo和P沉积在二元载体上。材料通过N ₂物理吸附，XRD，SEM-EDS，吸附的CO _2进行表征FTIR（碱度测量），拉曼光谱和紫外可见光谱。通过化学成分（EDAX）和HR-TEM研究了硫化催化剂。通常，表面碱性位点的数量和强度随着二元载体中的稀土含量为5 wt％或更高而增加。沉积的钼酸盐分散体在载体中的镧含量增加。然而，逐渐增加的载体上稀土负载对气相噻吩HDS（523–563 K，在大气压下运行的稳态固定床活塞流反应器）有害。难硫化的四面体Mo物种可能是通过在碱性条件下浸渍在La修饰的载体孔中而使原先存在于一锅酸性（pH〜1.9）Co-Mo-P溶液中的杂多钼酸盐分解而产生的。关于负载在原始氧化铝上的材料的正丁烷。